MOSFET Tsav Circuit Requirements

Nrog rau cov neeg tsav tsheb MOS niaj hnub no, muaj ntau qhov kev xav tau tshwj xeeb:

1. Kev siv hluav taws xob tsawg

Thaum daim ntawv thov ntawm 5V hloovfais fab movLub sijhawm no yog siv cov qauv totem ncej, vim hais tias lub triode tsuas yog 0.7V nce thiab nqis poob, uas ua rau lub rooj vag tshwj xeeb kawg ntawm qhov hluav taws xob tsuas yog 4.3V, lub sijhawm no, kev siv lub rooj vag voltage. ua 4,5vMOSFETs muaj qee qhov kev pheej hmoo.Tib yam xwm txheej kuj tshwm sim nyob rau hauv daim ntawv thov ntawm 3V los yog lwm yam low-voltage switching fais fab mov.

2.Wide voltage thov

Lub keying voltage tsis muaj tus lej tus nqi, nws txawv ntawm lub sijhawm los yog vim lwm yam. Qhov kev hloov pauv no ua rau lub zog tsav tau muab rau MOSFET los ntawm PWM Circuit Court tsis ruaj khov.

Txhawm rau kom ruaj ntseg zoo dua MOSFET ntawm lub rooj vag siab siab, ntau MOSFETs tau teeb tsa qhov ntsuas hluav taws xob kom yuam kev txwv ntawm qhov loj ntawm lub qhov rooj voltage. Nyob rau hauv cov ntaub ntawv no, thaum tsav voltage yog coj mus rau ntau tshaj qhov voltage ntawm lub regulator, ib tug loj static function poob yog tshwm sim.

Nyob rau tib lub sijhawm, yog tias lub hauv paus ntsiab lus ntawm resistor voltage divider yog siv los txo lub rooj vag voltage, nws yuav tshwm sim yog hais tias lub keyed voltage siab dua, lub MOSFET ua hauj lwm zoo, thiab yog hais tias tus keyed voltage yog txo, lub rooj vag voltage tsis yog. txaus, ua rau tsis txaus tig-rau thiab tig-tawm, uas yuav txhim khu kev ua haujlwm poob.

MOSFET overcurrent tiv thaiv Circuit Court kom tsis txhob muaj hluav taws xob hlawv hluav taws xob (1)

3. Kev siv dual voltage

Hauv qee qhov kev tswj xyuas Circuit Court, cov logic feem ntawm Circuit Court siv qhov raug 5V lossis 3.3V cov ntaub ntawv voltage, thaum lub zog tso zis feem siv 12V lossis ntau dua, thiab ob qhov hluav taws xob txuas nrog rau hauv av.

Qhov no ua rau nws pom tseeb tias yuav tsum tau siv lub zog hluav taws xob hluav taws xob kom cov hluav taws xob tsawg sab tuaj yeem tsim kho qhov hluav taws xob siab MOSFET, thaum lub zog hluav taws xob MOSFET yuav tuaj yeem tiv nrog cov teeb meem tib yam tau hais hauv 1 thiab 2.

Hauv peb qhov xwm txheej no, kev tsim kho totem ncej tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua, thiab ntau tus neeg tsav tsheb MOS uas twb muaj lawm tsis zoo li suav nrog lub rooj vag voltage txwv kev tsim kho.